Can a refrigerator that is 21.5 cubic feet fit in a space that is 21 cubic feet?
1.Yes, the 0.5 extra cubic feet would not make a difference.
2.No, the refrigerator is bigger than the available space.
3.No, it is too small for the space.
4.Yes, since the refrigerator is just a little bigger than the space, you can squeeze it in.